Perhaps there was some damage to the camera or pinhole that let a lot more light in. Most likely, it was due to the increase in light intensity when: a) the atmosphere is cleaner (this increases as you get closer to the poles) b) there is a lot of reflection from snow or water I have to decrease exposures when I go from upstate NY just to the Maine coast! Test it first. Jim K
-----Original Message----- From: HypoBob <hypo...@pacbell.net> To: pinhole-discussion@p at ??????? <pinhole-discussion@p at ???????> List-Post: pinhole-discussion@pinhole.com Date: Saturday, September 23, 2000 12:43 PM Subject: [pinhole-discussion] Paper negative mystery >Recently I took a pinhole camera to Alaska and exposed several negatives > >on a developer-incorporated, B&W, variable contrast RC paper. > >Upon my return, development of these paper negatives resulted in very >dense, very flat negatives, as if the whole negative had been uniformly >and heavily fogged. This was a complete surprise because exposure and >development were exactly as I had done in the past with no problems. > >My first thought was that the latent image had degraded in the six days >between exposure and development. However, a subsequent test reveals >that while the latent image will change a little in six days, the change > >is not nearly enough to explain this problem. > >I also wondered if the airport carry-on x-ray machines had fogged the >paper, but unexposed paper that went through the x-rays has since been >used and shows no fogging at all. > >Another thought is that maybe the abundant UV at higher latitudes had >simply overexposed the negatives. With no glass to attenuate UV, the >UV-sensitive B&W paper negatives were exposed to the entire UV spectrum. > >Do any of you have any answers, suggestions, thoughts as to why a >process that works fine here in sunny California would meet with such >disaster on a trip to Alaska??? > >Bob > > >_______________________________________________ >Pinhole-Discussion mailing list >Pinhole-Discussion@p at ??????? >unsubscribe or change your account at >http://www.p at ???????/discussion/ >
